There's still a question over helmets?!?! Got mine about 4 years ago (15 years into my snowboarding career) because my buddy and I collided and I forgot how to talk for a few weeks. Now I find it warmer (toque only covers to the ears at the most), more comfortable (goggles don't press into my face and rub itchy toque on me lol), and just downright better.
When I'm flying through the trees, off little cliffs, etc. do I want to be worried about keeping my head safe?
To each his own I guess. I used to ride a sportbike and helmets are mandatory in Canada. Saw some guys in Philly popping wheelies on enduro's with no helmets and I just about puked my stomach turned so much.
Would you bet money that you could ride around holding a watermelon all day and not crack it?